<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%
String formurl = request.getContextPath() + "/systemProperty/search.do";
%>
<form action="<%=formurl %>" method="get">
<label>搜什么</label><input type="text" name="key">
<input type="submit" value="Search">
</form>